Progressive dry kiln for lumber



M. m. Hmmm@ PROGRESSIVE DRY KILN FOR LUMBER :Fmdm 25,. 1924 N VEN TOR. HARRY D TsEMmN H. HEMAMN z-ROGRESSIVE DRY KILN FOR LUMBEH Filed May 23, 1924 Slmeawumm 2 ODOOOOOOODOOOO OOOOOOCOOOOOOOOO (1)0000 OOCQODODO OOOOOOOOO-(OOOQO 000000006000000() 00000 OCJDOOGO Piaf-Z INVENTOR. HARRY Dy TIEMANN mail my es,

To aZZ will/'m il? may; corwefm:

le it lmovm that l, HARRY D. TIEMMJN, `(fillzen of the nited States el America, anal employee of the @operi-mem of Agli-- eulmfe, residing; in Madison? llseonsn, Whose poselice al'ldess is Medisch, Wiscomin, lleve invented an lmpovement in a Prcg'essve Bry l'llll E01 lmnlbel'.

This application ls malle under ille slet olf ll/leeh ("5, 1883, Chapter 'M3 Stat. and the invention herein llescbed and claimed-Indy be used Aby the Government 01": "lilged Statesylemd ils-efrcers nml om pleyeee, and 'by amy person in lle United Sleee' Without *the payment to me of any myalty eher-een. l: hereby fleflcale the same te the" use si the G-ovemment :md lle people el' the Unlvtecl States.

invention consists of an improvement in e, plogjressye of dry kiln consstng essentially le one or eee-feral fans placed loe-l eafth the coils lm-engel sues "m slsssl the natural Gurenl, of air Xeturnng from "alle cold to the hol, enel of "alle kiln, anfl so dispos-ed with reference to the heating coils, ventilators, lumber piles, and steam jes as to pocluee an increasingly drier and hotter cmiren of alf passing through the piles of lumbel as "alle piles are progessel from the hoi: te the Sol enel ll'le kiln. The lumber may' lwefiple( etllelj lw'awse or oli' 'lle kiln, but eillxei areasp-lling; ox" end piling Will (lo lef edge'wise piled lumber,

Fogressye kilns of Various types a1'- -iengfe for endwse circulation of the air se "alle fsellarge end is het :md ley enel lie lling end cooler and meist have been in use many years. For the drying of geen lumber 'the ai? cculnpn is fnquently in eullclent in sucifln films. The essentiel feelime o my nvenlen yylg'cll l Claim ns novel elmslsts in 'the 'alleeeflfxetl of fans bowel-le gne lun'llre' in a. pmgfsslve kiln in such en minime? es i0 accelerate and control the cil*- eulmien lengllwse el' the kiln.

l'n alle accmpenyng drawings:

l is a longitudinal section llrougll the kiln.

Figc 2 is e cross sectlonel elevato'n.

The kiln itself consists of e long ellemloer olf Wesel or mel er :my sualole building material tlu'eugl which the piles Gf lumber 1924i. smal zelo. 'Malles may be movedl from one end lo lle oller in n. progressive manner, "ehe usual .method being to place lumbe on Wheeled trucks which run on mils length of the kiln. Beneath the mils me placefl steam healing; pipes. The chamber may be of any length mi crees section, bul' pyefe'febly 16 to il@ feet Wide Wills three' mils for cxosspilefl lumbe or Il; :mils for eclge stacked enpleol, :mal il@ fill feel, with inw@ mils for edge S25-asked end-pil@ lumH leer, about 16 feet im laeiglf emcl lom 80 to ll) feel; 'le length. ln this respect the kiln @Loes not flillel eseezxtially imm the many' Well known pmgessve kilns new in use lin the space beneath the 'healing cells mul ille floor are placed *elle several Elms, in une 'row fm namew kilns er :ln "mm lows im. Wider chambes. The fans popellecl an electr moof placed oueide the kiln The fans me nel', housed excepi; es fer es necessary' le protee allem fom njmvy. y

ln the drawings l is the loasllng end of "lle kiln closed. by a suitable light lil-,ting elor; 2 is the dselmrge end Wih a simile" door. 3, 3eme theloacls of lumber (shown fletwse erosspleil in this ease); 4f, Laye the nails; 5, 5 the heetng pipe@ which :we arranged se as to concentrate elle lient al; 'alle dieelmrglng emlunflez the lumber about to be removed; 6&6, 5 fans {eetl-)nml 'zo a common slmit if irl/ren by the motor 8.`

`Whle ll have incleetecl a single meier @lijven y 'shalt fol' operatmg the fans, l do not re s'el'lct my Inventum to ls arrzmgemem as the 'fans may manifestly be opemlerl seperately and by' 'belt Connected engines 011 motors. 9 is an @peiling with en acluslable damper 9ZL into an exlxleus; flue i0; l1 is e fresh ai? inlet regulaed with e., ramper 11a; l2 is e. series of steam jes consislzlg of a line of perfm'alell pipe 01' arly @they sulla zflole form el' Steam ids, 'foy milling; lxumlflty l0 lle. el? *when equ'ecl. y

Aswill be obsex'vefl from Fig. l l'l'le heuling pipes (lo not exlencl clem to the cool m' loading end, l, 0l ille kiln and near the lsehm-ging or hol: enel, 2, more pipes are added. The hot dry all eecenils towards lle eri-acl 2, passes in a. generally hovizontal drectirm through the piles towards the oppcsite end, 3l. `ln (loing so il, absorbs mosfou'e from the lumber and le cooled i'hereby eml 'clescencls meer the 'enel l? passing belew 'lbs ezetenellilg threugh the heating pipes. IHere it travels in the reverse by the fans, rising again at thisend completing the circuit. To prevent the air from becoming too moist fresh air is admitted through the 'duct 11 and the excess moist air escapes through the ventilator 9. It' they air is too dry, moisture is added by the steam jets. As the lumber is shoved in the opposite direction to the air movement, it encounters lirst cool damp air in a partly descending direction, andinally hot dry air.

in a somewhat ascending direction as indicated by the arrows.

Having fully described the improvement in the progressive type of dry kiln land the manner of its operation, I claim as original:

1. In a progressive dry kiln arranged for atwise cross-piling or for edgewise endor cross-piling of lumber, Jfans without housing placed beneath the lumber in such a manner as to accelerate the endwise circulation of air inthe kiln, and means for rotating the fans.

2. In a pr'ogressive dry kiln arranged for flatwise cross-piling or edgewise 'endor cross-piling of lumber fans placed beneath the piles of lumber in such a manner as to accelerate the endwise circulation of air in the kiln, and means to rotate the fans.

3. In a progressive dry kiln arranged tor latwise cross-piling or for edgevvisc endor cross-pilin of lumber the combination of heatingcolls beneath the lumber arranged so as to concentrate the 'heat towards the dry end of the kiln, fans without housing;r placed beneath the lumber in such a man* ner as to accelerate the endwise circulation, means for rotating` the fans, 'and steam jets below the rails, substantially as shown.

4. In-a progressive dry kiln cont-aining lumber, the combination of heating coils beneath the lumber, fans without housing placed beneath the lumber in such a manner as to accelerate the endwise circulation, means for rotating the fans, and steam jets below Athe rails, substantially as shown.

5. In a progressive dry kiln arranged for Ilatwise cross-piling or edgewise endor cross-piling of lumber, fans placed beneath the piles of lumber insuch a manner as to accelerate the endwise circulation of air in the kiln, means to rotate the fans, heating pipes arranged to concentrate the heat towards the dry end of the kiln, and steam jets beneath the rails, substantially as shown.

6. In a progressive dry kiln containing lumber, the combination of heating coils beneath the lumber, one fan without housing placed beneath the lumber in such a manner as to accelerate the eudwise circulation, and means for rotating the fan.

April 3, 1921i.

HARRY DONALD TIEMANN.

Witnesses:

J .'D.` MAcLnAN, BENJ. L. NELSON. 

